Have Firefox remember Z order and use that to select which tab gets focus when the current tab is closed

Question

I have three tabs open: Tab1, Tab2, and Tab3.

I'm on Tab2 and middle click on a link to open in a new tab (Tab4).

I go to Tab4 to read what was opened there.

With Tab4 still having focus, I close it.

At this point, how can I have focus return to Tab2 since it was most recent in Z order, not Tab3 as Firefox defaults to do?

Answer 1

This is one of the main reasons I use tab mix plus.

Answer 2

Have a look at the add-on LastTab. If I understand your dilemma correctly, it should do what you want it to and also provide some customizable configuration as well.

Otherwise, I'm sure there it can be altered somewhere in about:config.